Stores advertise heavily for Thanksgiving and Christmas to lure you into their stores. They offer 20%, 40% and even 75% off. Your adrenaline begins to flow as you shop for bargains. You find the perfect gift! Now, let’s look at a few ways to mentally calculate your discount and sale price.

Math is like playing a sport or playing a piano. In order to improve your skills, practice is required. Well, Richard W. Fisher provides this much needed practice in his books Mastering Essential Math Skills. Book One is for 4th and 5th grade, and Book Two is for grades 6th – 12th.